Dictionary

femtosecond

noun fem·to·sec·ond \ˈfem(p)-tə-ˌse-kənd, -kənt, -tō-\

Definition of FEMTOSECOND

:  one quadrillionth of a second

First Known Use of FEMTOSECOND

1976

Browse

Next Word in the Dictionary: femurPrevious Word in the Dictionary: femto-All Words Near: femtosecond
April 18, 2015
wimple Hear it
to veil, ripple, or meander
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears